On the anti-automorphism of the Steenrod algebra: II

The relations of Barratt and Miller are shown to include all relations among the elements $P^i\chi P^{n-i}$ in the mod $p$ Steenrod algebra, and a minimal set of relations is given.Comment: 6 page

A mobility analysis of the occupational status of the graduates of the University of Palermo in an economic crisis context

In such a global economic crisis context, our aims are describing the mobility of the Palermitan graduates in the labour market, identifying the variables that influence most their occupational status and finally outlining a transition probability structure among the states: Work, Search for a Job, Study, Other. The availability of a large amount of longitudinal data provided by the surveys carried out by STELLA (Statistics about Graduates and Labour Market) allowed us to analyze the mobility of the graduates of the University of Palermo among the different occupational states in three different times. We analyze data coming from a disproportionate stratified sample of graduates in 2009, interviewed three different times: one year (2010), three years (2012), five years (2014) after the graduation. To achieve our aim, first we provide a brief descriptive analysis of the main characteristics of the graduates gathered by the three different surveys; secondly we fit a time inhomogeneous multi-state Markov model with piecewise constant intensities; eventually implications from the main results are discussed

Dati e \u201cpresi\u201d \u2026 dal mito ad un osservatorio sulla povert\ue0 sanitaria

Secondo l\u2019Organizzazione Mondiale della Sanit\ue0 la salute \ue8 uno stato di totale benessere fisico, mentale e sociale e non semplicemente l\u2019assenza di malattia o infermit\ue0.L\u2019Unione Europea emana, periodicamente, documenti, linee guida e direttive, valide per ogni Stato membro, per integrare, sostenere e aggiungere valore alle politiche del Welfare per migliorare la salute dei cittadini e ridurre le disuguaglianze in termini di salute. Nei documenti ci si riferisce anche alla dotazione, in ogni territorio, delle stesse strutture di cura, degli stessi protocolli e della stessa formazione del personale medico-sanitario. L\u2019idea di fondo del programma \ue8 che il mantenimento delle persone in buona salute generi effetti positivi sul Paese, fra cui la riduzione delle disuguaglianze in termini di salute e il pi\uf9 ambizioso obiettivo della \u201ccrescita inclusiva\u201d di tutti i cittadin

The effect of women’s participation in labour market on postponement of childbearing: a comparison between Italy and Hungary

This paper analyses the effect of the increasing female participation in the labour market onthe transition to first childbirth. In this analysis both the ge nerational and the regional perspective are taken into account to understand, how postponement behaviour is spreading from one region to the other and from one generation to the next. The analysis is based on the first wave of the Generations and Gender Survey of Italy and Hungary. It adopts a multilevel event history model to focus on the micro-level relationship between the transition to adulthood and reproductive behaviour, to understand the empirical importance of macro-level factors related to regional socio-economic and cultural differences and to indicate differences in micro-level relationships among people of different family, socio-economic, and educational backgrounds. The results of the model shows that the delayed entry into labour market has a significant negative effect on the probability of having a child. This effect remains significant also controlling for generations, regional heterogeneity and increasing of female participation

The annihilator ideal of the action of the Steenrod algebra on H∗(RP∞)

AbstractThe mod 2 cohomology of real projective space RP∞ has a simple, but rich structure as a module over the Steenrod algebra. In this paper we determine the annihilator ideal of H∗(RP∞), and some other spaces of interest

On the Sampling Size for Inverse Sampling

In the Big Data era, sampling remains a central theme. This paper investigates the characteristics of inverse sampling on two different datasets (real and simulated) to determine when big data become too small for inverse sampling to be used and to examine the impact of the sampling rate of the subsamples. We find that the method, using the appropriate subsample size for both the mean and proportion parameters, performs well with a smaller dataset than big data through the simulation study and real-data application. Different settings related to the selection bias severity are considered during the simulation study and real application

The Cayley plane and String bordism

This paper shows that, away from 6, the kernel of the Witten genus is precisely the ideal consisting of (bordism classes of) Cayley plane bundles with connected structure group, but only after restricting the Witten genus to string bordism. It does so by showing that the divisibility properties of Cayley plane bundle characteristic numbers arising in Borel-Hirzebruch Lie-group-theoretic calculations correspond precisely to the divisibility properties arising in the Hovey-Ravenel-Wilson BP-Hopf-ring-theoretic calculation of string bordism at primes >3.Comment: 27 pages, significantly improved exposition following suggestions by Haynes Mille